Portable telephone with simplified operation



FIG. 1 is a front plan view of my design for an portable telephone with simplified operation;

FIG. 2 is a rear view;

FIG. 3 is a left side view;

FIG. 4 is a right side view;

FIG. 5 is a top view; and,

FIG. 6 is a bottom view. 

The ornamental design for an portable telephone with simplified operation, as shown and described. 